/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.util;



import javax.annotation.Nullable;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.Serializable;

import java.util.Arrays;



/**

 * A wrapper around {@link Throwable} that preserves the stack trace on serialization, unlike

 * regular {@link Throwable}.

 */

public final class SerializableThrowable implements Serializable {

  @Nullable

  private final Throwable throwable;

  @Nullable

  private final StackTraceElement[] stackTrace;



  public SerializableThrowable(@Nullable Throwable t) {

    this.throwable = t;

    this.stackTrace = (t == null) ? null : t.getStackTrace();

  }



  @Nullable

  public Throwable getThrowable() {

    return throwable;

  }



  private void readObject(ObjectInputStream is) throws IOException, ClassNotFoundException {

    is.defaultReadObject();

    if (throwable != null) {

      throwable.setStackTrace(stackTrace);

    }

  }



  @Override

  public boolean equals(Object o) {

    if (this == o) {

      return true;

    }

    if (o == null || getClass() != o.getClass()) {

      return false;

    }

    SerializableThrowable that = (SerializableThrowable) o;

    return Arrays.equals(stackTrace, that.stackTrace);

  }



  @Override

  public int hashCode() {

    return Arrays.hashCode(stackTrace);

  }

}